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71. 发明授权

US06236051B1 Semiconductor radiation detector 失效
标题翻译：半导体辐射探测器
公开(公告)号：US06236051B1
公开(公告)日：2001-05-22
申请号：US09277162
申请日：1999-03-26
申请人： Tsutomu Yamakawa , Takashi Ichihara
发明人： Tsutomu Yamakawa , Takashi Ichihara
IPC分类号： G01T124
CPC分类号： G01T1/2928
摘要： A semiconductor radiation detector has a plurality of semiconductor cells arrayed in a matrix parallel to the X-Y plane. A plurality of common electrodes for applying an operating voltage to the semiconductor cells are arranged perpendicularly to the X-Y plane. A plurality of signal electrodes for reading out signals from the semiconductor cells are arranged perpendicularly to the X-Y plane. According to a feature of this invention, each common electrode is shared by a pair of semiconductor cells adjacent in the X direction, and each signal electrode is shared by a pair of semiconductor cells adjacent in the X direction. With this arrangement, the dead zone can be reduced to increase the pixel density, in other words, the spatial resolution. If the pixel density is kept unchanged, the sensible zone of the semiconductor cell can be widened to increase the detection sensitivity.
摘要翻译：半导体辐射检测器具有以平行于X-Y平面的矩阵排列的多个半导体单元。用于向半导体单元施加工作电压的多个公共电极垂直于X-Y平面布置。用于从半导体单元读出信号的多个信号电极垂直于X-Y平面布置。根据本发明的特征，每个公共电极由在X方向上相邻的一对半导体单元共享，并且每个信号电极由在X方向上相邻的一对半导体单元共享。通过这种布置，可以减小死区以增加像素密度，换句话说，增加空间分辨率。如果像素密度保持不变，则可以加宽半导体单元的显着区域以增加检测灵敏度。

72. 外观设计

USD420688S Bearing unit 失效
公开(公告)号：USD420688S
公开(公告)日：2000-02-15
申请号：US104191
申请日：1999-04-28
申请人： Takashi Ichihara
设计人： Takashi Ichihara

73. 外观设计

USD383965S Square shaped flange unit 失效
公开(公告)号：USD383965S
公开(公告)日：1997-09-23
申请号：US36705
申请日：1995-03-24
申请人： Takashi Ichihara
设计人： Takashi Ichihara

74. 发明授权

US5457321A Spect apparatus utilizing fan-parallel data conversion 失效
标题翻译：利用扇形并行数据转换的光谱装置
公开(公告)号：US5457321A
公开(公告)日：1995-10-10
申请号：US237421
申请日：1994-05-03
申请人： Takashi Ichihara , Akiyoshi Kinda
发明人： Takashi Ichihara , Akiyoshi Kinda
IPC分类号： G01T1/164 , G01T1/166
CPC分类号： G01T1/1648 , G01T1/1642 , A61B6/037 , Y10S378/901
摘要： A SPECT apparatus for forming a radioisotope distribution topographic image of an object, in which a detector such as a fan beam collomator detects fan beam shaped gamma ray emitted from a radioisotope given to the object to provide fan beam data, while a scanner causes relative rotation between the object and the detecter, and a data collector collects the fan beam data, and in which a data converter successively converts the fan beam data into parallel beam data during the relative rotation, and a reconstructor reconstructs a tomographic image from the parallel beam data. The fan beam data having a first matrix size and a first angle may be converted into the parallel beam data having a second matrix size and a second angle which are different from the first matrix size and the first angle, respectively.
摘要翻译：一种用于形成物体的放射性同位素分布地形图像的SPECT装置，其中诸如风扇光束胶体仪的检测器检测从给予对象的放射性同位素发射的扇形束形伽马射线，以提供风扇光束数据，同时扫描器引起相对旋转在物体和检测器之间，并且数据收集器收集风扇光束数据，并且其中数据转换器在相对旋转期间将风扇光束数据连续地转换为并行光束数据，并且重构器从平行光束数据重建断层图像。具有第一矩阵尺寸和第一角度的风扇光束数据可以被转换成具有分别与第一矩阵尺寸和第一角度不同的第二矩阵尺寸和第二角度的平行光束数据。

75. 发明授权

US5347455A Scintillation camera 失效
标题翻译：闪烁相机
公开(公告)号：US5347455A
公开(公告)日：1994-09-13
申请号：US139812
申请日：1993-10-22
申请人： Takashi Ichihara
发明人： Takashi Ichihara
IPC分类号： G01T1/164 , G06F15/42
CPC分类号： G01T1/1642
摘要： A scintillation camera comprises a camera body for detecting a .gamma.-ray emitted from radioisotope provided to a human body to be examined in a predetermined period of time, means for measuring an incident position of the .gamma.-ray and its density based on the detection result of the camera body, and means for generating a density distribution of the .gamma.-ray for every incident position based on the measurement result of the measuring means, thereby obtaining the density distribution of the .gamma.-ray for every incident position.
摘要翻译：闪烁照相机包括用于检测在预定时间段内提供给待检测人体的放射性同位素发射的伽马射线的相机体，基于检测结果测量伽马射线的入射位置及其密度的装置以及用于根据测量装置的测量结果为每个入射位置生成伽马射线的密度分布的装置，从而获得每个入射位置的伽马射线的密度分布。

76. 发明授权

US5311427A Method for removing artifact and for correcting sensitivity of single photon emission computerized tomography and apparatus thereof 失效
标题翻译：用于去除伪影和用于校正单个光子发射计算机断层摄影的灵敏度的方法及其装置
公开(公告)号：US5311427A
公开(公告)日：1994-05-10
申请号：US637268
申请日：1991-01-03
申请人： Takashi Ichihara
发明人： Takashi Ichihara
IPC分类号： G01T1/161 , G01T1/164 , G06F15/42
CPC分类号： G01T1/1648
摘要： A single photon emission computerized tomographic (SPECT) image acquiring method in which a fan-beam collimator radiation emitted from a radio isotope (RI) supplied into a biological body under medical examination is received with employment of a gamma camera, including the steps of: acquiring first projection image data by receiving via the fan-beam collimator radiation emitted from a reference isotope source; processing the first projection image data to obtain first correction data; acquiring second projection image data by receiving via the fan-beam collimator the radiation emitted from the radio isotope injected into the biological body; correcting the second projection image data with the first correction data so as to obtain third projection image data from which an artifact component has been eliminated; and, reconstructing a SPECT image of the biological body free from the artifact component based upon the third projection image data.
摘要翻译：一种单光子发射计算机断层摄影（SPECT）图像获取方法，其中使用γ照相机接收从在体检中提供给生物体的放射性同位素（RI）发射的扇形束准直器辐射，包括以下步骤：通过经由参考同位素源发射的扇形光束准直器辐射来接收第一投影图像数据; 处理第一投影图像数据以获得第一校正数据; 通过扇形光束准直器接收从注射到生物体中的放射性同位素发射的辐射来获取第二投影图像数据; 用所述第一校正数据校正所述第二投影图像数据，以获得从其中去除了人造物分量的第三投影图像数据; 以及基于所述第三投影图像数据重建所述生物体的没有伪影分量的SPECT图像。

77. 发明授权

US5227968A Method for eliminating scattered .gamma.-rays and reconstructing image, and gamma camera apparatus 失效
标题翻译：用于消除散射（伽马） - 重播和重构图像的方法，以及伽马相机装置
公开(公告)号：US5227968A
公开(公告)日：1993-07-13
申请号：US501039
申请日：1990-03-29
申请人： Takashi Ichihara
发明人： Takashi Ichihara
IPC分类号： G01T1/164
CPC分类号： G01T1/1642
摘要： A method of eliminating scattered gamma rays and collecting an image comprises the steps of detecting a radioisotope (RI) given to a living body, to form an RI distribution image, and eliminating scattered gamma rays generated in the living body or a gamma camera from the RI distribution image. In this case, the energy spectrums of gamma rays incident to individual positions in the gamma camera in association with pixels of the RI distribution image are collected at the same time as or during the collection of the RI distribution image. A ratio of the scattered gamma rays with respect to the RI distribution image is acquired from the energy spectrum for each position, and a scattered gamma ray component is eliminated from the RI distribution image for each pixel, by multiplying the ratio of the scattered gamma rays to the RI distribution image.

78. 发明授权

US5055687A Single photon emission CT apparatus 失效
标题翻译：单光子发射CT装置
公开(公告)号：US5055687A
公开(公告)日：1991-10-08
申请号：US562276
申请日：1990-08-03
申请人： Takashi Ichihara
发明人： Takashi Ichihara
IPC分类号： G01T1/161 , G01T1/164 , G01T1/20 , G01T1/29
CPC分类号： G01T1/2985 , A61B6/037
摘要： A single-photon emission computed tomography (SPECT) apparatus for detecting gamma rays emitted from a radioisotope given to a body to be examined, including three focus collimators and corresponding detectors arranged at 120.degree. intervals and each capable of rotating 120.degree. around the body for providing detection data; a processor for processing said detection data to produce reconstruction data corresponding to a density distribution tomographic image of the radioisotope in the body; and holding mechanisms for positioning a compensation radioisotope at the focus point of each focus collimator on a structure which rotates together with each focus collimator and corresponding detector upon rotation of each focus collimator and corresponding detector around the body.

79. 发明授权

US4866615A Scintillation camera compensation for shifting the center channel of the energy spectrum due to photomultiplier gain change 失效
标题翻译：闪光相机补偿由于光电倍增增益变化而移动能谱的中心通道
公开(公告)号：US4866615A
公开(公告)日：1989-09-12
申请号：US898232
申请日：1986-08-20
申请人： Takashi Ichihara
发明人： Takashi Ichihara
IPC分类号： G01T1/164 , G01T1/208
CPC分类号： G01T1/208
摘要： A scintillation camera apparatus includes a scintillation camera which generates X and Y position signals representing a detection position of gamma rays radiated from an object to be examined and a Z signal representing the energy level of the gamma rays, and an image memory for storing data indicating the detection frequency of the Z signal having an energy exceeding a predetermined level at a location accessed by the X and Y position signals. A first compensation table for compensating for the nonlinearity of the X and Y position signals and a second compensation table for the Z signal are provided for compensating for the X, Y, and Z signals to be supplied to the image memory. For compensating a change with time in gains of the photomultipliers, a data memory is provided for storing an energy spectrum of gamma rays in a real time manner. The peak valve position of the energy spectrum is calculated based on the data stored in the data memory. If the peak valve position changes, the content of the second compensation table is rewritten in accordance with the shifting of the peak valve position of the energy spectrum.
摘要翻译：闪烁照相机装置包括闪烁照相机，其产生表示从被检体的辐射的伽马射线的检测位置和表示伽马射线的能级的Z信号的X和Y位置信号，以及图像存储器，用于存储指示 Z信号的检测频率在由X和Y位置信号访问的位置处具有超过预定电平的能量。提供用于补偿X和Y位置信号的非线性的第一补偿表和用于Z信号的第二补偿表，用于补偿要提供给图像存储器的X，Y和Z信号。为了补偿光电倍增管增益随时间的变化，提供了一种用于以实时方式存储γ射线能谱的数据存储器。基于存储在数据存储器中的数据计算能谱的峰值阀位。如果峰值阀位改变，则根据能谱的峰值阀位置的移位来重写第二补偿表的内容。

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